TY  - RPRT
TI  - New trend- trigonometric model for interpolation and prediction of the geomagnetic field utilizing the new DGRF models
AU  - L.R. Alldredge
PY  - 1988
DO  - 10.5636/jgg.40.749
UR  - https://pubs.usgs.gov/publication/70014816
ID  - 70014816
ER  -